you’ve mentioned before only marked heirs can add the d’ before their last names yet there’s at least 1 example in the new book that contradicts that. I assumed it’s new thing cause 3.5 didn’t call it out but even Rising isn’t adhering to that. Can you clarify? It's largely a question of the prefix having meaning. The house names are well known. If all the d' means is "part of a house," the name Cannith DOES that; it doesn't need the d'. If the d' means "marked", then you can have a Cannith and a d'Cannith and it TELLS you something.

— Keith Baker (@HellcowKeith) December 7, 2019

This excerpt from the new Boromar section is what threw me, is this basically a typo? “head of the Boromar Clan, Saidan Boromar, is married to an unmarked heir of House Jorasco, Mala Boromar d’Jorasco”
Or is she bucking the norm on purpose for a specific reason? Yes, I’d think it’s a typo—but likely a common mistake people DO make in the setting itself.

— Keith Baker (@HellcowKeith) December 7, 2019